Red-shouldered Macaw

Quick Facts

  • Scientific Name: Diopsittaca nobilis
  • Spanish Name: Guacamayo alirrojo
  • Family: Psittacidae
  • Known Nicknames: Hahn's Macaw, Noble Macaw
  • Average Length: 30–35 cm / 12–14 in
  • Average Weight: 130–170 g / 4.6–6.0 oz
  • Wingspan: N/A
  • Key Feature: Bright red shoulder patch on green wings
  • Primary Diet: Primarily Frugivore and Granivore
  • Range: Northern South America (eastern Venezuela, the Guianas, and northern Brazil)
  • Habitat: Tropical lowland forests, savannas, and palm groves
  • Social Structure: Highly Social
  • Nesting/Breeding: Tree Hollows
  • Conservation Status: Least Concern (LC)
  • Population Trend: Stable

The Red-shouldered Macaw (*Diopsittaca nobilis*), the smallest of the macaw species, is a vibrant and energetic parrot native to northern South America. Despite its diminutive size—roughly 12 inches from beak to tail—it packs the bold personality and striking appearance of its larger cousins, featuring bright green plumage, a long tapered tail, and a distinctive red patch on the bend of its wing (the "shoulder") that gives it its name. A unique characteristic is its bare, white facial patch, which is smaller and less pronounced than in larger macaws, and its horn-colored (rather than black) lower mandible, which helps distinguish it from the similar Hahn's macaw. Special features include its remarkably loud, sharp calls for its size and a playful, acrobatic nature that makes it a popular companion bird, though its powerful beak requires ample enrichment to prevent boredom.

Fun Facts

Despite their small size, Red-shouldered Macaws are surprisingly loud and can mimic human speech with impressive clarity, often learning entire phrases. They have a quirky habit of “dancing” by bobbing their heads and fluffing their feathers when excited or during social bonding. One unique adaptation is their ability to rotate their heads nearly 180 degrees, which helps them scan for predators while foraging upside-down in the canopy. Their bare, white facial patches, unlike those of larger macaws, can flush pink when they are agitated or excited, acting as a subtle mood ring.

Habitats & Distribution

The Red-shouldered Macaw inhabits a variety of open and semi-open lowland environments, primarily within the Amazon Basin and the Guianas. Its preferred habitats include savannas, palm groves, gallery forests along rivers, forest edges, and cleared agricultural areas with scattered trees, such as pastures and plantations. It avoids dense, closed-canopy rainforest interiors, instead thriving in more disturbed or transitional zones. Geographically, the species ranges across northern and central South America, from eastern Colombia, Venezuela, and the Guianas, through much of Brazil north of the Amazon River, and into northern Bolivia and eastern Peru. Its distribution is closely tied to the availability of palm trees, like the buriti palm, which provide both food and nesting sites.

Behaviours & Reproduction

Red-shouldered Macaws are highly social, typically living in small family groups or flocks, and their pair bonds are strong and often lifelong. Mating involves mutual preening and feeding, with pairs nesting in tree cavities or termite mounds, where the female lays 2 to 4 eggs. A unique reproductive strategy is their reliance on cooperative breeding: older offspring from previous clutches may remain with the parents to help defend the nest and feed the new chicks, increasing survival rates. Incubation lasts about 23–24 days, and the chicks fledge after roughly 6 weeks, though they continue to be fed by the group for some time afterward.

Diet

The Red-shouldered Macaw is primarily a frugivore and granivore, with a diet heavily centered on seeds, fruits, and nuts gathered from the canopy and forest edges. They are particularly fond of palm fruits and the seeds of various tropical trees, often using their strong, hooked beaks to crack open hard shells. An interesting fact about their feeding behavior is that they will occasionally consume clay from riverbanks, a practice known as geophagy, which is believed to help neutralize toxins found in unripe or otherwise chemically defended fruits and seeds they ingest. In their native range, they also adapt to agricultural areas, sometimes feeding on cultivated fruits like mangoes and maize, though this can bring them into conflict with farmers.

Colors

The Red-shouldered Macaw is mostly bright green with a blue crown and yellow-green cheeks. Its most distinctive feature is the red patch on the bend of the wing and leading edge of the shoulder, with blue flight feathers and a maroon-red underside to the tail. This coloration provides camouflage in the rainforest canopy, where the green body blends with leaves, while the red shoulder patches are hidden when the wings are folded.